Matrix Macromolecules That Affect the Viscoelasticity of Calfskin

[+] Author and Article Information
P. L. Kronick, M. S. Sacks

U.S. Department of Agriculture, ARS, Eastern Regional Research Center, Philadelphia, PA 19118

J Biomech Eng 116(2), 140-145 (May 01, 1994) (6 pages) doi:10.1115/1.2895712 History: Received November 20, 1990; Revised June 04, 1993; Online March 17, 2008


The chemical basis of viscoelasticity of bovine skin was explored by mechanical relaxation spectroscopy after selective enzymatic degradation. Measurements covered a wide range of time scales because water was replaced in the tissue with aqueous mixtures of ethylene glycol, which maintained a water-like electrical environment for the charged macromolecules down to −50°C. Macromolecular components that couple the fibrils to the interfibrillar matrix contribute about half the values of the resultant storage and loss moduli, while removal of components that are readily extractable, so perhaps free in the matrix, did not alter these mechanical quantities or their relaxations. The precision of the method reveals the effects of fibril-attached matrix, when conventional methods of mechanical testing fail.

Copyright © 1994 by The American Society of Mechanical Engineers
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